Semiconductor apparatus

A semiconductor apparatus comprising:

• a driver comprising a first transistor and a second transistor;
• a signal level switching decision unit comprising a third transistor and a fourth transistor, both of which are copied from the first transistor and the second transistor, and configured to compare off-current of the third transistor and the fourth transistor and generate a switching control signal;
• and
• a first signal level switching unit configured to selectively invert a transmitter input signal in response to the switching control signal.

A semiconductor apparatus comprising:

• a first signal level switching unit configured to output a transmitter input signal as a first switching signal in response to a switching control signal;
• a driver configured to drive the first switching signal and output the first switching signal as a transmitter output signal;
• a second signal level switching unit configured to output the transmitter output signal as a second switching signal in response to the switching control signal;
• and
• a receiver configured to receive the second switching signal and output the second switching signal as a receiver output signal,
• wherein the second signal level switching unit inverts the transmitter output signal and outputs the inverted transmitter output signal as the second switching signal in response to the switching control signal when the first signal level switching unit inverts the transmitter input signal and outputs the inverted transmitter input signal as the first switching signal in response to the switching control signal, and
• wherein the second signal level switching unit outputs the transmitter output signal without inversion as the second switching signal in response to the switching control signal when the first signal level switching unit outputs the transmitter input signal without inversion as the first switching signal in response to the switching control signal.